diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/rtl/montprod.v | 62 |
1 files changed, 27 insertions, 35 deletions
diff --git a/src/rtl/montprod.v b/src/rtl/montprod.v index 00227d0..6d3d865 100644 --- a/src/rtl/montprod.v +++ b/src/rtl/montprod.v @@ -291,34 +291,25 @@ module montprod( //---------------------------------------------------------------- always @* begin : prodcalc - opb_addr_reg = b_word_index; - opm_addr_reg = word_index_reg; + opa_addr_reg = word_index_reg; + opb_addr_reg = b_word_index; + opm_addr_reg = word_index_reg; + s_mem_addr = word_index_reg; + tmp_result_we = 1'b0; + result_addr_reg = word_index_prev_reg; result_data_reg = s_mem_read_data; - case (montprod_ctrl_reg) - CTRL_LOOP_ITER: - //q = (s[length-1] ^ A[length-1]) & 1; - opa_addr_reg = length_m1; - default: - opa_addr_reg = word_index_reg; - endcase + if (montprod_ctrl_reg == CTRL_LOOP_ITER) + opa_addr_reg = length_m1; - case (montprod_ctrl_reg) - CTRL_LOOP_ITER: + if (montprod_ctrl_reg == CTRL_LOOP_ITER) s_mem_addr = length_m1; - default: - s_mem_addr = word_index_reg; - endcase - case (montprod_ctrl_reg) - CTRL_EMIT_S: - tmp_result_we = 1'b1; - default: - tmp_result_we = 1'b0; - endcase + if (montprod_ctrl_reg == CTRL_EMIT_S) + tmp_result_we = 1'b1; if (reset_word_index_lsw == 1'b1) @@ -336,14 +327,18 @@ module montprod( //---------------------------------------------------------------- - // s_select_write + // s_logic //---------------------------------------------------------------- always @* - begin : s_select_write + begin : s_logic shr_carry_in_new = 1'b0; muxed_s_mem_read_data = 32'h0; - s_mem_we_new = 1'b0; sa_adder_data_in = 32'h0; + add_carry_in_sa_new = 1'b0; + add_carry_in_sm_new = 1'b0; + s_mem_new = 32'h0; + s_mem_we_new = 1'b0; + case (montprod_ctrl_reg) CTRL_INIT_S: @@ -368,9 +363,6 @@ module montprod( end endcase - s_mem_new = 32'h0; - add_carry_in_sa_new = 1'b0; - add_carry_in_sm_new = 1'b0; case (s_mux_reg) SMUX_0: @@ -412,7 +404,7 @@ module montprod( begin end endcase - end // block: s_writer + end // s_logic //---------------------------------------------------------------- @@ -483,11 +475,11 @@ module montprod( begin if (calculate) begin - ready_new = 1'b0; - ready_we = 1'b1; + ready_new = 1'b0; + ready_we = 1'b1; + first_iteration_new = 1'b0; + first_iteration_we = 1'b1; reset_word_index_lsw = 1'b1; -// first_iteration_new = 1'b1; -// first_iteration_we = 1'b1; montprod_ctrl_new = CTRL_INIT_S; montprod_ctrl_we = 1'b1; end @@ -499,7 +491,6 @@ module montprod( if (word_index_reg == 8'h0) begin - loop_ctr_set = 1'b1; montprod_ctrl_new = CTRL_WAIT; montprod_ctrl_we = 1'b1; end @@ -507,6 +498,7 @@ module montprod( CTRL_WAIT: begin + loop_ctr_set = 1'b1; montprod_ctrl_new = CTRL_LOOP_ITER; montprod_ctrl_we = 1'b1; end @@ -531,7 +523,7 @@ module montprod( CTRL_L_CALC_SA: begin - s_mux_new = SMUX_ADD_SA; + s_mux_new = SMUX_ADD_SA; if (word_index_reg == 8'h0) begin @@ -543,8 +535,8 @@ module montprod( CTRL_L_STALLPIPE_SA: begin -// first_iteration_new = 1'b0; -// first_iteration_we = 1'b1; + first_iteration_new = 1'b0; + first_iteration_we = 1'b1; montprod_ctrl_new = CTRL_L_CALC_SDIV2; montprod_ctrl_we = 1'b1; reset_word_index_msw = 1'b1; |